I noticed in several of the application examples INTVcc is used to power supporting circuitry (specifically oscillator distribution).
1) If I was to use this power for a similar purpose, what is a reasonable current It can provide? (the data sheet implies up to 50mA with the specification for 1.3% line regulation from 0 to 50 mA).
2) Is this always on? or is it only on when one of the power supplies is running?